Hello,
Sorry for the problems with the unwanted emails coming into your WHM mail box. I'm not 100% sure what you mean by "whm mail inbox." Typically, in WHM, email accounts are created per the created cPanel account that have been added to the VPS/Dedicated server (where WHM is generally available). Depending on your server configuration, you should have access to SpamAssassin. If it's activated, you can use the Blacklist option to block specific spam emails. If you want an outside solution, you may want to try SpamCop. There are also third-party services that can screen for spam. You can check our articles on fighting spam for other ways to stop spam.
If you have any further questions or comments, please let us know.
Regards,
Arnel C.